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Audi B5 S4 2.7T

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Audi B5 S4 2.7T Engine Cooling Parts

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Auxiliary Water Pump Hose

ES#6800 - 078121082E - Auxiliary Water Pump Hose - Connects the auxiliary water pump to the coolant pipe under the intake manifold - Original Equipment Supplier - Audi

Connects the auxiliary water pump to the coolant pipe under the intake manifold

Brand:
Original Equipment Supplier - Corporate Logo
ES#:
6800
Mfg#:
078121082E
Back Ordered
$24.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Multipurpose Relay - Priced Each

Replacement 4 pin relay Used for fan control

Brand:
Wehrle - Corporate Logo
ES#:
3437884
Mfg#:
4H0951253
Ships in 2 Business Days
$12.99

This product was last offered at the strikethrough price on
07-15-2026

$11.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 92�C

ES#5270 - 078121113G - Thermostat - 92C - Includes sealing O-Ring - Mahle-Behr - Audi Volkswagen

Includes sealing O-Ring

Brand:
Mahle-Behr - Corporate Logo
ES#:
5270
Mfg#:
078121113G
In Stock at Vendor
$22.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Multipurpose Relay - Priced Each

ES#2901202 - 7M0951253A - Multipurpose Relay - Priced Each - Replacement 4 pin relay - Vemo - Audi Volkswagen Porsche

Replacement 4 pin relay Used for fan control

Brand:
Vemo - Corporate Logo
ES#:
2901202
Mfg#:
7M0951253A
In Stock at Vendor
$22.99

This product was last offered at the strikethrough price on
05-07-2026

$21.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 80°C

ES#3149471 - 075121113D - Thermostat - 80C - Does not include sealing O-Ring - Wahler - Audi Volkswagen

Does not include sealing O-Ring Lower temperature thermostat, stock is 87°C

Brand:
Wahler - Corporate Logo
ES#:
3149471
Mfg#:
075121113D
Ships on Sep 15, 2026
$21.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#2709072 - 8E0121321 - Expansion Tank Cap - Plastic pressure cap for expansion tank - URO - Audi

Plastic pressure cap for expansion tank 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
URO - Corporate Logo
ES#:
2709072
Mfg#:
8E0121321
Ships in 1 Business Day
$6.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermal Switch - 2 Pin

ES#2608211 - 357919369F - Thermal Switch - 2 Pin - Located in the coolant pipe that connects to the cylinder head - Febi - Audi Volkswagen

Located in the coolant pipe that connects to the cylinder head 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Febi - Corporate Logo
ES#:
2608211
Mfg#:
357919369F
Back Ordered
Auto Notify
$17.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Multipurpose Relay - Priced Each

ES#2576222 - 4H0951253 - Multipurpose Relay - Priced Each - Replacement 4 pin relay - Vemo - Audi Volkswagen

Replacement 4 pin relay Used for fan control

Brand:
Vemo - Corporate Logo
ES#:
2576222
Mfg#:
4H0951253
Ships in 1 day
$17.99

This product was last offered at the strikethrough price on
05-07-2026

$16.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Radiator Hose - Lower

Connects the lower radiator port to the thermostat housing

Brand:
Burgaflex - Corporate Logo
ES#:
4349554
Mfg#:
8D0121055T
Ships in 8 Business Days
$15.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Sensor Retaining Clip - Priced Each

ES#2865558 - 025121142 - Sensor Retaining Clip - Priced Each - Secures the coolant temperature sensor in place - Febi - Audi Volkswagen

Secures the coolant temperature sensor in place 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Febi - Corporate Logo
ES#:
2865558
Mfg#:
025121142
Ships on Oct 20, 2026
Auto Notify
$3.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 80°C

ES#2813093 - 075121113D - Thermostat - 80C - Includes sealing O-Ring - Hamburg Tech - Audi Volkswagen

Includes sealing O-Ring We Price Match - Give Us A Call or Chat!
Lower temperature thermostat, stock is 87°C

Brand:
Hamburg Tech - Corporate Logo
ES#:
2813093
Mfg#:
075121113D
Ships in 1 Business Day
$14.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Sensor Retaining Clip - Priced Each

ES#2586934 - 032121142 - Sensor Retaining Clip - Priced Each - Secures the coolant temperature sensor in place - Rein - Audi Volkswagen

Secures the coolant temperature sensor in place 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
2586934
Mfg#:
032121142
Ships in 3 Business Days
$4.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap - Black

ES#3970169 - 5Q0121321 - Expansion Tank Cap - Black - Keep proper pressure in your coolant system - Meyle - Audi Volkswagen Porsche

Keep proper pressure in your coolant system 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Meyle - Corporate Logo
ES#:
3970169
Mfg#:
5Q0121321
Ships on Sep 8, 2026
$12.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Multipurpose Relay - Priced Each

ES#3437886 - 4H0951253 - Multipurpose Relay - Priced Each - Replacement 4 pin relay - Flosser - Audi Volkswagen

Replacement 4 pin relay Used for fan control

Brand:
Flosser - Corporate Logo
ES#:
3437886
Mfg#:
4H0951253
Ships in 1 Business Day
$11.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Water Pump Gasket

ES#3479 - 078121043A - Water Pump Gasket - Ensure a proper seal when installing a new water pump - Victor Reinz - Audi Volkswagen

Ensure a proper seal when installing a new water pump

Brand:
Victor Reinz - Corporate Logo
ES#:
3479
Mfg#:
078121043A
Ships in 1 day
$8.99

This product was last offered at the strikethrough price on
08-13-2026

$5.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap Seal

ES#2598146 - 1H0121687A - Expansion Tank Cap Seal - Seals the expansion tank cap to the reservoir. 28.5x3.8 - Vaico - Audi Volkswagen

Seals the expansion tank cap to the reservoir. 28.5x3.8 We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
2598146
Mfg#:
1H0121687A
In Stock at Vendor
$3.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Engine Cooling Parts

Optimize your engine cooling system performance and heater output with quality drive belts, coolant hoses, cooling system parts, and approved coolant fluids from ECS Tuning. Head off expensive repairs and untimely breakdowns with regularly scheduled cooling system inspection and maintenance.

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Manufacturer names and/or part numbers are used only for identification purposes.

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